Sheet Work Flashcards
(24 cards)
What is the function of sperm cells?
To fertilise the egg.
What is the function of nerve cells?
To carry information in your nervous system.
What is the function of root hair cells?
Absorbs water in a plant.
How is the sperm cell adapted to its function?
A long tail whips from side to side, helping the sperm cell to swim.
How is the nerve cell adapted to its function.
Lots of dendrite to make connections with other nerve cells.
How is the root hair cell adapted to its function?
Greatly increases the surface area available for water to move into the cell.
What do xylem cells transport?
water
What do phloem cells do?
Move water and products of photosynthesis from source tissues to their sink regions where they are stored.
How are xylem cells adapted to their function?
Lose their end walls so the system forms a continuous, hollow tube.
How are phloem cells adapted to their function?
They have pierced ends so that the cell is connected to the next, allowing the free flow of the cytoplasm.
What is light microscopes magnification?
x1500
What is electron microscopes magnification?
x500,000
What is resolution?
The ability to distinguish details of a specimen or sample.
What is the formula for magnification?
size of image / actual size of object
What are the 4 rules for biological drawings?
1) use pencil
2) title your drawing
3) use a ruler to draw label lines
4) write the magnification
What 3 things need to be copied before mitosis can occur?
DNA, ribosomes and mitochondria
Step 1 of mitosis:
Signals for separation.
Step 2 of mitosis:
Replicates everything in the cell.
Step 3 of mitosis:
Chromosomes line up in single file.
Step 4 of mitosis:
Chromosomes separate.
Step 5 of mitosis:
The cell is dividing.
Step 1 of active transport:
Solute recognised and grabbed by the transport protein.
Step 2 of active transport:
Protein rotates in membrane and releases solute inside the cell (using energy).
Step 3 of active transport:
Protein rotates back again (often using energy).
